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2017 iPad, 2 hours usage, medium brightness, battery now 90%. Not bad.
 
But something strange happened tonight. I always charge my home overnight so it’s ready for the day. So I plugged it in yesterday at ~60%. When I woke up. The battery was “charging” and 22%. So it drained all the battery overnight while plugged in which is strange. Someone had the same issue?

This happened to my iPad Air 2 running the PB a few times. I would put it in a plane mode, plug it in, it would make a charging sound, sit there for a few hours and then stay at the same or slightly lower battery percentage. Does not seem to happen without the plane mode activated. I have had too many betas on it by now (since PB3), so will just do a clean restore once iOS 11 is out and see how it holds.

For iOS 11 battery life in general, so far it has been worse for me on iPhone SE & iPad Air 2. Not massively, but still noticeable to the point that I prefer to keep the phone in a low battery mode when I am out.
 
For me, the problem with 11's battery life isn't usage time, but standby time. If I used my SE straight off the charge and never put it down until the end of the day, I could get iOS 10 level battery usage time. But whenever I put the phone down for even like 2 hours, up to 5% would drain. I was on the firmware for a week, so it couldn't still be indexing, right?
 
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The battery life is terrible even after 5 days of use. The standby time is especially terrible and I have to turn on Low Power mode to get back the pre iOS 11 battery life.

I don’t remember the same happened with iOS 10 GM. The springboard also crashes frequently.
 
The battery life is terrible even after 5 days of use. The standby time is especially terrible and I have to turn on Low Power mode to get back the pre iOS 11 battery life.

Yeah I agree that the battery isn't great, though I wouldn't say it was terrible. It's decent with Low Power Mode but when I turn that on it basically turns my SE into a 5s in terms of speed, which isn't very pleasant considering there's still a little bit of stutter present on iOS 11 GM without LPM turned on.
 
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11gm iphone SE.
Drain was noticeable after 72 hours of usage, and a few resets.
Found a number of bugs in applications, and Music App usage.
I've returned to 10.3.3, and I think I'll wait until 11.1 release before upgrading again.
 
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7+ here. Battery has been terrible after downloading iOS 11. Getting about 5 hours of use instead of the normal 7-8 I used to get of medium - heavy use.
 
There have been multiple springboard crashes in a day, about 4-5 times on my iPhone 7 Plus. Today the phone even rebooted itself (the home button became unresponsive i.e. no haptic feedback for about 10 seconds). I feel like I'm running the first one or two betas of the OS. I am afraid there were not enough testing or bug fixing on Apple's side. For the first time I don't recommend anyone to update to this 11.0 release at least on the iPhone. On the iPad the system is more stable. I don't know why.
 
After waiting 72h after installing GM as someone suggested, and rebooting in the morning and before sleep, i can say that my battery is bether, but I dont know if its the same as in iOS 10. I want to believe it is, but I get the feel that it lasts way less, abot 3-4h less. I used to go out on fridays till 12am and no need to charge my phone since the last night. Got home after with about 10-20% left.

Im uploading a picture of my usage today, going to sleep with 7% left. Is this usage normal?

Check your brightness. iOS update often "reset" the brightness, sometimes the system will have a new default etc. The brightness of the screen affect the battery life a lot (almost the single most relevant factor indeed). Keep it below 50%, of if possible, at about 25%, in my own experience, for your usage (mainly whatsapp, Safari, nothing high demand), should able to have 9-10 hours screen on time. And 20+ hours standby time.
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It was literally in the space of about 30 seconds.

The remaining battery seems not real time updated. It's like fetch in irregular basis. e.g. It can keep at 100% for 90min, and then drop to 90% in 5min.

Try not to focus on the % but check if the actual usable time is normal.

e.g. For a phone less then 1yr, ~50% brightness, no high demanding apps. The battery should allow 8-10 hours on screen usage.

for a 1-3 year phone, should be around 6-8 hours.

for a 3 years+ phone, usually between 4-7 hours (very depends on battery health)
 
The GM turns WiFi on by default (seems to always be on)
That may be part of the issue

Wifi toggle only turns on by itself if your wifi networking ( inside the privacy settings) is off. Make sure you turn on privacy. The toggle is meant to recognise a network so u can easily connect or disconnect from it via the toggle. To keep a memory of a particular network, it needs wifi networking
 
Wifi toggle only turns on by itself if your wifi networking ( inside the privacy settings) is off. Make sure you turn on privacy. The toggle is meant to recognise a network so u can easily connect or disconnect from it via the toggle. To keep a memory of a particular network, it needs wifi networking
What WiFi Networking? Inside the Location Services?
 
I haven’t tried any betas but just installed the GM. I feel that my battery is draining faster too. I updated mine before going to bed, so all the indexing should have been done during the night while on the charger. I have a 6s.
I don't believe in the whole indexing thing. Not sure who made that up. But in my experience whenever I update the battery does act weird. 90% of the time the battery drains faster than usual and recalibrating the battery usually does the trick.
To recalibrate drain the battery to 0% and than charge it to 100%.
 
I don't believe in the whole indexing thing. Not sure who made that up. But in my experience whenever I update the battery does act weird. 90% of the time the battery drains faster than usual and recalibrating the battery usually does the trick.
To recalibrate drain the battery to 0% and than charge it to 100%.

It is possible to require indexing indeed, just not always applicable. e.g. my wife’s 128GB 6s+ only has ~10GB empty space. But after update, it shows 110GB available. Obviously it takes time to index and shows the correct info again. And her phone has about ~20000 photos. Indexing really take some time and resources.

But my phone can shows the correct info right after update, no hot CPU, and I had pretty normal battery usage.
 
iOS 10 on my 6S Plus would be at 30% or so after a 13 hour shift and what for me is normal use. iOS 11 GM, same use, battery drains completely after 10-11 hours. Even watched it lose 1% every 2 seconds one day. If I just listen audiobooks or stream music / podcasts it’s not too bad. As soon as I actually do anything with the phone that involves the screen on the battery plummets. It lost 4% just typing this.
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This was at 43% when I posted that last reply. I’ve browsed the internet for about 10 minutes, sent a couple of messages, and checked Facebook for a minute or two.
 
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